... in deltaic and alluvial deposits can be added their presence in the shallow marine Late Jurassic Canyon Springs Sandstone in the southern Black Hills, South Dakota. Proposed origin for dish structures from antidunes or grain flow in the upper flow regime are not compatible with associated structures...

... in these techniques. A more satisfactory. approach toward predicting the sedimentary environment is achieved with two cumulative probability curve techniques and with the regional and stratigraphic variations in single grain-size parameters. A lower foreshore to shallow marine sand bank environment is deduced...

... orthoquartzitic sandstones with thinner siltstones and mudstones. The arenite member at the base of the Wit-Mfolozi section is attributed mainly to shallow marine deposition. The upper 5 m display features which are suggestive of a low tidal sandflat environment. These include reactivation structures, herringbone...

.... The lack of bioturbation, even in what were probably shallow shelf environments, supports the latter conclusion that metazoans capable of bioturbation evolved later than 1.3 eons B.P. Geological Society of America 1976 ...

...ANTHONY G. DORÉ Abstract Interpretation of shallow seismic reflection profiles indicates a thick Permo-Triassic to Jurassic sequence, overlain in the west of the region by at least 400 m of upper Cretaceous. Both sequences are folded along E.–W., westerly-plunging axes. Cores obtained from an area...

...GORDON S. FRASER Abstract The St. Peter—Platteville transition consists of three formations representing an upward change in deposition from quartz arenites to shallow-water carbonate rocks. The St. Peter Sandstone is the lower unit and is composed of conglomerate and shale overlain by quartz...

...) shallow basinal limestones and sandstones transitionally overlain by (2) shallow-shelf skeletal micrites, (3) oolite or coated-grain calcarenite-bar deposits, (4) lagoonal dolomitized pelletal lime mudstones and interbedded sandstones, and finally (5) intertidal algal-flat and supratidal salt-flat (sabkha...

...Alfred C. Lenz Abstract The growth and subsequent melting of the latest Ordovician-earliest Silurian glaciers in north and south Africa were responsible for a global transgression and regression. The shallow-water platform carbonates of the Cordilleran and Arctic regions of North America encompass...

...R.R. Nair Abstract The “mud banks” of Kerala (southwest India), a potential modern analogue of an ancient hydrocarbon-generating environment, are in nearshore shallow water about 10 m deep. Individual banks extend over an area of 25 sq km or more. They are characterized by rapidly accumulating fine...

... and pelletoidal packstones, and (5) a fenestral facies of extensively burrowed and bored, light gray mudstones and packstones which possess fenestral fabric. The facies are interpreted as reflecting deposition on a broad platform on which an oolite shoal separated a shallow-water lagoon from a more open marine...

... Group). The sediments appear to have been deposited in a shallow marine basin that was slightly displaced and then subsided rapidly as the dominantly submarine basalts of the Vandfaldsdalen and Mikis formations were erupted. Macro- and micro-fossils indicate that this basin was present by upper Albian...

...Amos Bein Abstract Rudistid reefs are well developed in Albian-Turonian strata in Israel. These strata are divided laterally into shallow-shelf carbonate rocks (the Judea Limestone) deposited on the Arabian craton and fine-detrital carbonate deposits (the Talme Yafe Formation) on its margins...

...WALTER H. ADEY; RANDOLPH BURKE Abstract Based on aerial and surface reconnaissance of shallow-water reefs and algal ridges throughout the Lesser Antilles and coring of reef-ridge structures on St. Croix, Martinique, Antigua, and Guadeloupe, major emergent and shallow-water Holocene bioherms...

...George A. Seiglie; Mounir T. Moussa Abstract The Quebradillas Limestone (latest Miocene—Pliocene) consists mostly of limestone and lesser amounts of dolomite and marl. It overlies the “Aymamon limestone” whose uppermost part represents a shallow fore-reef environment. The Quebradillas is divided...

... Trench in the southern Yukon. The overall pattern of the occurrences indicates that the shallow neritic portion of the continental shelf in Early Cambrian time traces a pattern widely diverse from that of the later, superimposed, Laramide structural trend. Portions of the continental shelf were already...

... and the Zr/P ratio. The depositional environment of these rocks is postulated to be either shallow marine or terrestrial. Les roches métavolcaniques acides de la ceinture 'greenstone' de l'Abitibi contiennent de la chloritoïde et de la kyanite; ces roches ont acquis un excès d'alumine grâce à l'érosion...